!! Please do some research before using this, I have not validated any materials for use at high temperature !!

This is a model of a stock Storz & Bickel Volcano Easy Valve Mouthpiece. It's aimed to be as dimensionally and functionally identical to the original, which is reflected in the default settings and included stl. It can be customized if you would like to adjust the tolerances, shape of the lip piece, or detent, which controls the travel of the sliding action. If editing, adjust the $fn parameter lower to preview changes faster at the expense of render accuracy.

All dimensions are based on measurements, with the curved lip surface approximated with a log function. I have tested this to function with an easy valve bag, but I will continue to fine-tune the tolerances until the only difference I can tell is the surface finish. At that point, I will attempt to make a second version with additional features to help prevent bag leakage.